Sexual Health

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  • Aciclovir


Sexual Health
  • Medication features

    Aciclovir is an antiviral treatment used for genital herpes. It has a dosage of one tablet three times a day if being used to treat an outbreak, otherwise one tablet twice a day is sufficient for a preventative dose. It is important to remain hydrated during treatment and drink plenty of water.

    • Antiviral medication
    • Used to treat genital herpes
    • Treats both outbreaks and prevention


NOTE: After selecting this product, you will need to complete a short assessment, so we can make sure this medication is suitable for you. Pricing is provided as a reference only. The final decision on issuing this medication remains with our GP / Pharmacist.

Aciclovir is an antiviral medication that can be used to help reduce symptoms of a genital herpes outbreak. It can also be used to help suppress the virus, to prevent symptoms from reappearing.


For an initial outbreak of genital herpes, the recommended dose is 400mg three times a day for five days.

If you have more than six outbreaks a year, it is recommended to take a suppression course of 400mg twice a day for three months.


  • Is Aciclovir safe long term?

    Yes, Aciclovir is safe to take long term over several months, which is helpful for those who experience recurrent genital herpes to keep it under control.

  • Does Aciclovir affect the contraceptive pill?

    There are no known interactions between Aciclovir and the contraceptive pill, so it is safe to take both at the same time. However, if you experience any side effects such as vomiting or diarrhoea, this can affect the effectiveness of the pill.

  • How quickly should Aciclovir work?

    Ideally, you should start taking Aciclovir as soon as possible after symptoms appear. It can also be taken as a preventative measure for long-term sufferers. If it’s your first time taking Aciclovir, the first course will likely be around ten days. The results do not show immediately, so it is important to continue the treatment until told to stop.

  • How can I manage side effects?

    Side effects like diarrhoea can be reduced by using over the counter treatments such as Loperamide. Nausea can be prevented by taking Aciclovir with or just after food. There are options available for vomiting such as cyclizine, promethazine, and prochlorperazine, which can be purchased here at Pharmacy Online.

Side Effects

There is always a risk of side effects with all medications. Some of these can be quite mild and can subside over time. Others are more serious and should be reported to your GP right away if you experience any side effects. Please contact a member of our team if you are concerned about any potential side effects that may occur when taking aciclovir.

Common side effects may include:

  • Fatigue
  • Nausea
  • Diarrhoea
  • Abdominal pain
  • Fever
  • Vomiting
  • Dizziness

You should inform a healthcare professional if you start to show any of the following side effects:

  • Seizures
  • Drowsiness
  • Confusion
  • Agitation
  • Tremor


Info Leaflet

Before taking any medicines, regardless of whether they are over the counter or prescription-only, it is essential always to read the patient information leaflet.

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